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Merge branch 'netns-opt' 

Cong Wang says:

====================
net: some minor optimization for netns id

Cong Wang (2):
  vxlan: call peernet2id() in fdb notification
  netns: avoid disabling irq for netns id
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2016-09-04 11:39:59 -07:00
parent 76644232e6 bc51dddf98
commit 6f2a802763
2 changed files with 17 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/net/vxlan.c
View File

@ -287,7 +287,7 @@ static int vxlan_fdb_info(struct sk_buff *skb, struct vxlan_dev *vxlan,
if (!net_eq(dev_net(vxlan->dev), vxlan->net) &&
nla_put_s32(skb, NDA_LINK_NETNSID,
peernet2id_alloc(dev_net(vxlan->dev), vxlan->net)))
peernet2id(dev_net(vxlan->dev), vxlan->net)))
goto nla_put_failure;
if (send_eth && nla_put(skb, NDA_LLADDR, ETH_ALEN, &fdb->eth_addr))

37
net/core/net_namespace.c
View File

@ -215,31 +215,29 @@ static void rtnl_net_notifyid(struct net *net, int cmd, int id);
*/
int peernet2id_alloc(struct net *net, struct net *peer)
{
unsigned long flags;
bool alloc;
int id;
spin_lock_irqsave(&net->nsid_lock, flags);
spin_lock_bh(&net->nsid_lock);
alloc = atomic_read(&peer->count) == 0 ? false : true;
id = __peernet2id_alloc(net, peer, &alloc);
spin_unlock_irqrestore(&net->nsid_lock, flags);
spin_unlock_bh(&net->nsid_lock);
if (alloc && id >= 0)
rtnl_net_notifyid(net, RTM_NEWNSID, id);
return id;
}
EXPORT_SYMBOL(peernet2id_alloc);
/* This function returns, if assigned, the id of a peer netns. */
int peernet2id(struct net *net, struct net *peer)
{
unsigned long flags;
int id;
spin_lock_irqsave(&net->nsid_lock, flags);
spin_lock_bh(&net->nsid_lock);
id = __peernet2id(net, peer);
spin_unlock_irqrestore(&net->nsid_lock, flags);
spin_unlock_bh(&net->nsid_lock);
return id;
}
EXPORT_SYMBOL(peernet2id);
/* This function returns true is the peer netns has an id assigned into the
* current netns.
@ -251,18 +249,17 @@ bool peernet_has_id(struct net *net, struct net *peer)
struct net *get_net_ns_by_id(struct net *net, int id)
{
unsigned long flags;
struct net *peer;
if (id < 0)
return NULL;
rcu_read_lock();
spin_lock_irqsave(&net->nsid_lock, flags);
spin_lock_bh(&net->nsid_lock);
peer = idr_find(&net->netns_ids, id);
if (peer)
get_net(peer);
spin_unlock_irqrestore(&net->nsid_lock, flags);
spin_unlock_bh(&net->nsid_lock);
rcu_read_unlock();
return peer;
@ -406,17 +403,17 @@ static void cleanup_net(struct work_struct *work)
for_each_net(tmp) {
int id;
spin_lock_irq(&tmp->nsid_lock);
spin_lock_bh(&tmp->nsid_lock);
id = __peernet2id(tmp, net);
if (id >= 0)
idr_remove(&tmp->netns_ids, id);
spin_unlock_irq(&tmp->nsid_lock);
spin_unlock_bh(&tmp->nsid_lock);
if (id >= 0)
rtnl_net_notifyid(tmp, RTM_DELNSID, id);
}
spin_lock_irq(&net->nsid_lock);
spin_lock_bh(&net->nsid_lock);
idr_destroy(&net->netns_ids);
spin_unlock_irq(&net->nsid_lock);
spin_unlock_bh(&net->nsid_lock);
}
rtnl_unlock();
@ -544,7 +541,6 @@ static int rtnl_net_newid(struct sk_buff *skb, struct nlmsghdr *nlh)
{
struct net *net = sock_net(skb->sk);
struct nlattr *tb[NETNSA_MAX + 1];
unsigned long flags;
struct net *peer;
int nsid, err;
@ -565,15 +561,15 @@ static int rtnl_net_newid(struct sk_buff *skb, struct nlmsghdr *nlh)
if (IS_ERR(peer))
return PTR_ERR(peer);
spin_lock_irqsave(&net->nsid_lock, flags);
spin_lock_bh(&net->nsid_lock);
if (__peernet2id(net, peer) >= 0) {
spin_unlock_irqrestore(&net->nsid_lock, flags);
spin_unlock_bh(&net->nsid_lock);
err = -EEXIST;
goto out;
}
err = alloc_netid(net, peer, nsid);
spin_unlock_irqrestore(&net->nsid_lock, flags);
spin_unlock_bh(&net->nsid_lock);
if (err >= 0) {
rtnl_net_notifyid(net, RTM_NEWNSID, err);
err = 0;
@ -695,11 +691,10 @@ static int rtnl_net_dumpid(struct sk_buff *skb, struct netlink_callback *cb)
.idx = 0,
.s_idx = cb->args[0],
};
unsigned long flags;
spin_lock_irqsave(&net->nsid_lock, flags);
spin_lock_bh(&net->nsid_lock);
idr_for_each(&net->netns_ids, rtnl_net_dumpid_one, &net_cb);
spin_unlock_irqrestore(&net->nsid_lock, flags);
spin_unlock_bh(&net->nsid_lock);
cb->args[0] = net_cb.idx;
return skb->len;